Overdrive problem or lockup?
 

I went and bought a 94 Dodge 2500 12v with a 1000 mile old tranny and it shifts like butter until overdrive. it shifts into it if im accelerating moderately hard but as soon as I try and keep maybe 50mph it kicks out. Overdrive solenoid bad? or tranny ground?
any help would be sweet. Thanks

Sounds like the TV cable is out of adjustment, or the TPS is bad. Do a google search for "dodge diesel maintenance tips" for a very nice walkthrough on how to diagnose the TPS.

I would say your throttle linkage could be out of adjustment, which will cause TPS issues ...

Check out youtube for video's on how to do the adjustments :tu:

I work on trans for a living and the output speed sensor can get a dead spot in reading and cause it to drop from 4th. After checking cable if all good there then replace the output speed sensor next.

mine was doing the same .. it was tps .. if it were shifting late I would say cable or sensor ..

Never heard of an output speed sensor issue on a pre 98.5 Ram. Hm.

Yeah .. if it were an RE trans ( Post 98 ish ) I would say it is possibel .. I think if your running a 12V you have an RH , Or am I wrong for the 2nd time this year ? :humm:

Yea didn't look at year it is a govener unit so no speed sensor on that one just the speedo sensor. Also if it has that square switch in the dash I have seen it build up too much resistance and cause it to drop 4th. I have one in my box at work saw it the other day and laughed as thought never use this thing so if comes to that I can get it to u cheap. I also have a new three pin od/tcc solenoid if interested in buying it. Find out what u can get it for and will give u this one at half off that price. Lt1z350@bellsouth.net if wanna email me and talk about it.

'98 has the RE. I may be wrong for more like... the tenth time or so this year, but I'm going to go out on a limb and say it was the first year for it, making it one of many 1998 firsts for the 12v before it went out to pasture in 98.5.

I just found that out today as well 97's did have RE also ... I guess if it were a problem with O/D or Lock-up .. I would say sensors ... anything else TCM

It's interesting the significant changes they made every year or so in these trucks, when so much of them remained completely the same for years. You can't just look to the major restyling of generations for things like most vehicles I've had. I'm going to have so much useless trivia in my head from Ram trucks by the time I find a new project to obsess over that I won't have any room left in there. :s:

If you read his post at the begining he states it is a 1994 truxk which makes it a 618 for those wanting to be technical. 1995 last of the mechanical govener years 1996 begins the electronic pressure govener and in 2000 it changed from a high resistance metal body govener pressure sensor to the low resistance plastic govener pressure sensor. If he ever decides to check his own post again I have all he needs to fix it and willing to to sell it to him well below cost just to help out.

Or as we in Dodgeramville like to call them, the 47RH.

There aint nothin better than a Dodge Truck .. nothin else is even remotely able to be obsessed over due lack of money cause the Dodge will Suck ya dry !!! .. LOL